CA1100803A - Method of making and applying supports for containers - Google Patents
Method of making and applying supports for containersInfo
- Publication number
- CA1100803A CA1100803A CA246,432A CA246432A CA1100803A CA 1100803 A CA1100803 A CA 1100803A CA 246432 A CA246432 A CA 246432A CA 1100803 A CA1100803 A CA 1100803A
- Authority
- CA
- Canada
- Prior art keywords
- elongated
- spaced apart
- strips
- edges
- sheet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
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- Pallets (AREA)
- Making Paper Articles (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A method of making an elongated load bearing support of rectangular cross section for a shipping container. The method comprises the steps of selecting a plurality of elon-gated rectangular strips of corrugated sheet material having elongated spaced apart edges and in which the corrugations are perpendicular to the spaced apart edges. A plurality of these elongated rectangular strips are stacked side-by-side in adja-cent contiguous relationship to form a packed body of contiguous layers with the spaced apart edges of the strips exposed so as to present generally flat opposed surfaces. The contiguous layers are adhesively secured together to prevent displacement of the layers relative to each other. Facing pieces are pro-vided and adhesively secured to each of the flat opposed sur-faces. A coating of pressure sensitive adhesive and a remov-able protective sheet for the pressure sensitive adhesive is applied to the outer surface of at least one facing piece.
A method of making an elongated load bearing support of rectangular cross section for a shipping container. The method comprises the steps of selecting a plurality of elon-gated rectangular strips of corrugated sheet material having elongated spaced apart edges and in which the corrugations are perpendicular to the spaced apart edges. A plurality of these elongated rectangular strips are stacked side-by-side in adja-cent contiguous relationship to form a packed body of contiguous layers with the spaced apart edges of the strips exposed so as to present generally flat opposed surfaces. The contiguous layers are adhesively secured together to prevent displacement of the layers relative to each other. Facing pieces are pro-vided and adhesively secured to each of the flat opposed sur-faces. A coating of pressure sensitive adhesive and a remov-able protective sheet for the pressure sensitive adhesive is applied to the outer surface of at least one facing piece.
Description
llUU8~3 This invention relates to a method of making a support attachable to the wall of a shipping container and a method of spacing a container from a surface using such a support.
Shipping containers used in industry to package and transport various products, component parts and the like frequently take the form of relatively large boxes of corru-gated material or cardboard which are sometimes supplied in knocked-down form and assembled as required. The bottom wall of such containers may be relatively weak because of the inherent nature of the box material or because the bottom side actually comprises flaps folded and secured together. In any event, handling and stacking of such containers by means of fork-lift trucks is facilitated if the box is disposed on some sort of pallet. Conventional reuseable pallets made of wood or other materials are commercially available. However, they must be stored before and after use and this requires space. In addition, such pallets are relatively costly and deposit arrangements are sometimes required to insure their return to the supplier.
Cheaper disposable pallets have been made from a flat sheet of corrugated material to the bottom surface of which discrete rolls of corrugated material are attached by conven-tional air-drying gluing processes. Again, however, such pallets are relatively large and require an undue amount of storage space. Furthermore, the manufacture of such pallets requires considerable space to house the pallets till the glue sets. Strips of wood, such as 2 x 4's, or other materials, have also been glued directly to the bottom of previously assembled containers by conventional air-drying glues, to provide con-tainers having built-in pallets. However, these arrangements have drawbacks. For example, wood is costly and is not ordinarily salvageable or reuseable for pallet purposes. Made-up containers - 1 - ~
:~0~8~3 having built-in pallet means require relatively costly manu~ac-turing techniques and more storage space than simple conventional knock-down type corrugated boxes or containers.
The following patents further disclose the state of the art in palletized containers: United States Patents 3,247,810, 3,331,496; 3,398,703, 3,425,367, 3,464,371; 3,519,190 3,605,651, 3,695,506 and 3,697,029.
The present invention aims to overcome the problems discussed by providing a new way of making a load-bearing support for adhesive attachment to the wall of a container to space it from a surface. In accordance with the invention, as load-bearing body material, narrow sheet material, preferably corrugated sheet material, is selected with the parallel edges and the corrugations perpendicular thereto. The sheet material is assembled into a packed body of contiguous layers with the parallel edges exposed to present generally flat opposed sur-faces. A rigid facing piece is adhesively secured to each of the opposed surfaces. A coating of instant bonding adhesive and a removable protectlve sheet is applied to the outer sur-face of one facing piece. In one form of the invention, thesheet material is selected in the form of an elongated strip and the assembling is effected by winding it into a packed cylindrical body with the free end attached to the adjacent layer to hold the support together. In another embodiment, the sheet materlal is selected in the form of a plurality of rect-angular strips and the assembling is effected by stacking the strips eide-by-s:ide in adjacent contiguous relationship to form a packed body of rectangular cross-section. Preferably, in these structures, the adjacent layers are adhesively secured together.
The facing pieces may be applied as separate sheets of relatively rigid material or by wrapping a sheet of flexible material, for :: '
Shipping containers used in industry to package and transport various products, component parts and the like frequently take the form of relatively large boxes of corru-gated material or cardboard which are sometimes supplied in knocked-down form and assembled as required. The bottom wall of such containers may be relatively weak because of the inherent nature of the box material or because the bottom side actually comprises flaps folded and secured together. In any event, handling and stacking of such containers by means of fork-lift trucks is facilitated if the box is disposed on some sort of pallet. Conventional reuseable pallets made of wood or other materials are commercially available. However, they must be stored before and after use and this requires space. In addition, such pallets are relatively costly and deposit arrangements are sometimes required to insure their return to the supplier.
Cheaper disposable pallets have been made from a flat sheet of corrugated material to the bottom surface of which discrete rolls of corrugated material are attached by conven-tional air-drying gluing processes. Again, however, such pallets are relatively large and require an undue amount of storage space. Furthermore, the manufacture of such pallets requires considerable space to house the pallets till the glue sets. Strips of wood, such as 2 x 4's, or other materials, have also been glued directly to the bottom of previously assembled containers by conventional air-drying glues, to provide con-tainers having built-in pallets. However, these arrangements have drawbacks. For example, wood is costly and is not ordinarily salvageable or reuseable for pallet purposes. Made-up containers - 1 - ~
:~0~8~3 having built-in pallet means require relatively costly manu~ac-turing techniques and more storage space than simple conventional knock-down type corrugated boxes or containers.
The following patents further disclose the state of the art in palletized containers: United States Patents 3,247,810, 3,331,496; 3,398,703, 3,425,367, 3,464,371; 3,519,190 3,605,651, 3,695,506 and 3,697,029.
The present invention aims to overcome the problems discussed by providing a new way of making a load-bearing support for adhesive attachment to the wall of a container to space it from a surface. In accordance with the invention, as load-bearing body material, narrow sheet material, preferably corrugated sheet material, is selected with the parallel edges and the corrugations perpendicular thereto. The sheet material is assembled into a packed body of contiguous layers with the parallel edges exposed to present generally flat opposed sur-faces. A rigid facing piece is adhesively secured to each of the opposed surfaces. A coating of instant bonding adhesive and a removable protectlve sheet is applied to the outer sur-face of one facing piece. In one form of the invention, thesheet material is selected in the form of an elongated strip and the assembling is effected by winding it into a packed cylindrical body with the free end attached to the adjacent layer to hold the support together. In another embodiment, the sheet materlal is selected in the form of a plurality of rect-angular strips and the assembling is effected by stacking the strips eide-by-s:ide in adjacent contiguous relationship to form a packed body of rectangular cross-section. Preferably, in these structures, the adjacent layers are adhesively secured together.
The facing pieces may be applied as separate sheets of relatively rigid material or by wrapping a sheet of flexible material, for :: '
2 -: ~
:
: . : -110(~803 example, corrugated material, around the packed structure to provide the facing strips and securing the free end of the flexible material to the structure. The wrapped around sheet may, if desired, be adhesively secured to the surfaces all around the packed structure. The corrugated material may be made from paperboard or other material from which corrugated is usually made.
In the use of the support, a container having a designated wall to be spaced and a support are also selected.
The removable sheet is removed from the support to uncover the adhesive face. The adhesive surface of the support is then pressed against the designated wall of the container to which it will immediately adhere by the action of the adhesive. One or several supports may be applied to one or more walls of the container in various arrangements depending on the spacing or supporting function desired.
According to a broad aspect, the present invention provides a method of making an elongated load bearing support of rectangular cross-section to be attached by pressure sen-sitive adhesive to a shipping container having a bottom walland a pair of spaced apart side walls to space said bottom wall from a support surface and strengthen said bottom wall, com-prising the steps of: selecting a plurality of elongated rec-tangular strips of corrugated sheet material having elongated spaced apart edges and in which the corrugations are perpen-dicular to said spaced apart edges, stacking said plurality of elongated rectangular strips side-by-side in adjacent con-tiguous relationship to form an elongated packed body of con-tiguous layers with said spaced apart edges of said strips exposed so as to present generally flat opposed elongated parallel surfaces, adhesively securing together said contiguous layers to prevent displacement of said layers relative to each ~ _ 3 _ E
110~81Q3 other, providing a first facing piece and a second rigid facing piece, adhesively securing said first facing piece to one of said flat opposed surfaces and adhesively securing said second rigid facing piece to the other of said flat opposed surfaces to strengthen and rigidify said elongated packed body and protect said edges of said strips, conforming the length of said elongated support substantially to the dimension bet-ween one pair of said spaced apart side walls and applying a coating of pressure sensitive adhesive and a removable protec-tive sheet for said pressure sensitive adhesive to the outersurface of at least one of said first and second facing piece.
The invention has been generally described and it will now be referred to in more detail by reference to the accompanying drawings, which illustrate preferred showings of supports made by the method of the invention and containers to which such supports have been applied. Referring more particularly to the d~awings:
Figure 1 is an isometric view from the top of a container having supports secured to it according to the invention Figure 2 is an isometric view of the bottom wall of the container shown in Figure 1:
Figure 3 is an enlarged end view of a support shown in Figures 1 and 2 Figure 4 is an isometric view of a support shown in Figures 1, 2 and 3 - 3a -g~
Figure 5 is an isometric view of another form of support;
Figure 6 is an isometric view of a cylindrical support;
Figure 7 is a bottom plan view of the support shown in Figure 6, Figure 8 is an isometric view of the bottom of a container employing cylindrical supports applied in accordance with one aspect of the invention, Figure 9 is a view similar to Figure 8 but showing supports applied in accordance with another aspect, and Figure 10 is an isometric view showing two containers disposed in side-by-side relationship with supports applied in accordance with the invention used for palletizing and to per-form a spacing function therebetween.
Referring to Figures 1 and 2, the numeral 10 desig-nates a conventional shipping container as used in industry topackage and transport various products, component parts or other contents and with which the present invention is advantageously employed to space the container from a surface. Figure 1 shows the container 10 resting on one side to provide a view of its underwall. The container 10, for example, may take the form of a box formed of corrugated material or cardboard which is supplied to the user in the form of a flat knocked-down blank to be assembled when needed. The container 10 comprises a top wall comprising two inwardly foldable flaps 12 and 14, a bottom wall also comprising two inwardly folded flaps 16 and 18 best seen in Figure 2, a front wall 20, a rear wall 22, a front wall 24 and a rear wall 26. The mating edges of the top flaps 12 and , llU~)8~3 14 are sealable by a strip of adhesive paper or tape 30, as shown in Figure 2. The mating edges of the bottom flaps 16 and 18 are also sealed by a strip of adhesive paper or tape 32, as shown in Figures 1 and 2.
To facilitate the handling and stacking of container 10 by means, for example of a fork-lift truck or similar appara-tus, or merely to space the container from the surface on w~ich it rests supports made according to the invention in the form of elongated legs or runners 34 and 36 are secured to the bottom side of the container by means of a quick-drying adhesive, such as a pressure sensitive adhesive.
As Figure 2 best shows, the supports 34 and 36 are elongated and of rectangular cross-section, and in this example are arranged in spaced apart relationship on the bottom wall of a container 10 so that their longitudinal axes extend trans-versely to the mating edges of the flaps 16 and 18 on the bottom wall of the container. When the elongated supports 34 and 36 are arranged in this manner they serve to strengthen the under-side of the container 10 as well as to provide means for spacing it from the surface on which it rests thereby providing a palletized container easily liftable by a fork-lift truck.
Since the supports 34 and 36 are made identically, only the manufacture of the support 36 will be described in detail. A plurality of long narrow corrugated sheet material strips are selected, with the long sides having parallel edges and corrugations perpendicular thereto. The material may be of corrugated paperboard of the type readily available in the container industry. These strips are arranged alongside one another and secured against displacement, in a stack, by fold-ing an outer sheath 42 around the stack and securing it togetheras by applying glue at 44 or several staples 46. In assembling the structure, glue may also be applied to adhesively secure the 8~)3 adjacent strips 40 together, prior to wrapping with the sheath 42. Glue may also be applied to the inner sides of the sheath 42 as at 50. As Figure 3 shows, each strip has been preferably arranged in a plane transverse (i.e. at right angles) to the bottom surface of the container 10, thus enabling a support 36 to support a greater compressive load.
A coating or layer 52 of quick drying or instant bond-ing adhesive, preferably pressure sensitive adhesive, is applied to the upper side 51 of the support 36 during manufacture. A
removable sheet or layer 54 of paper or film, treated to prevent it from adhering permanently is applied to the layer 52 for eventual peeling away.
After the container 10 has been assembled and at least the bottom side has its flaps 16 and 18 folded inwardly and - -suitably secured in place, as by the tape 32 to form a wall, the supports 34 and 36 are suitably arranged and attached to the bottom wall. In attaching a support 34 or 36, the protective sheet 54 is stripped away and the adhesive coated surface 50 -pressed against the wall of the container 10. The quick drying or instant bonding adhesive takes hold immediately to secure the support 34 or 36 to the container wall. Figures 1 and 2 show two elongated supports 34 and 36. Additional supports, arranged in a desired manner and with desired spacing may be applied to the wall of the container.
Figure 5 is a perspective view of another type of elongated support 60 made similarly to support 36. A plurality of strips 62 of corrugated material or cardboard are secured together as at 64 by adhesive. Unlike support 36, a folded outer sheet is not wrapped around the outside. Rather a facing piece 63 formed of corrugated material is glued by a suitable adhesive to the face presented by the edges of the strips 62.
The strips 63 and 65 are applied to strengthen and rigidify the )3 entire support 60 and protect the edges of the strips 62 forming the surface of the stack. Applying the top strip 63 provides a flat uninterrupted surface for the layer 68 of instant bonding adhesive. The bottom strip 65 is of hardboard, selected to be rugged and strong and capable of withstanding scuffing and scraping. As with the support 36, a layer 68 of quick drying or instant bonding adhesive protected by a removable sheet 70 is applied to the upper surface 66 of the top strip 63. The support 60 is applied by the same method and for the same purpose as the support 36, as described earlier.
Figures 6 and 7 show still another type of support 72, manufactured in accordance with the invention. Figures 8 and 9 show pluralities of supports 72 which have been affixed to the underside of containers 74 and 76, respectively. The containers 74 and 76 are similar to the container 10. In this case, each support 72 is made by winding or rolling a long narrow strip 80 of corrugated material or cardboard of uniform width into a generally cylindrical body. Glued as at 82 or a staple 84 is applied to the free end of the strip 80, to secure it in place and prevent the strip 80 from unravelling. A coat-ing or layer 88 of quick drying adhesive is applied to one flat end of the cylindrical body 72 serving as the upper side of the support. A removable sheet or layer 90 of paper or film is applied over the glue to protect it until ready for use.
The supports 72 may be usefully applied to the bottom of a container in various arrangements. Figure 8 shows supports 72 arranged symmetrically, one near each box corner. Figure 9 shows nine supports 72 arranged in symmetrical rows of three each. It is preferable to place the supports as shown in Figure 9 rather than as in Figure 8 if the containers 75 have to carry a substantially heavier load.
Figure 10 shows two containers lOa and lOb arranged .
)3 in side-by-side relationship. Two spaced apart supports 36 have been applied to the bottom wall of each container to space it from its supporting surface. In addition, a support 34a has been applied to a side or end wall 20 to serve as a buffer or spacer against the adjoining container lOb.
As an example of dimensions, making one embodiment of support 60 of the type shown in Figure 5, the components were selected so that the support was about 27-1/2 inches long, 4 inches wide and 3 inches high. About twenty strips 62 of corrugated material, each of the order of 3-3/16th of an inch thick were selected, assembled, and each joined to its adjacent strip by conventional air drying adhesive. For the bottom strip 65, hardboard of the order of 1/8th of an inch thick was selec-ted, and for the top strip 63, there was selected corrugated material of the order of l/8th of an inch to 3/16th of an inch thick.
It is evident that the invention provides a convenient way of spacing a shipping carton from a surface and a new way of making supports for this purpose economically from readily avail-able material. By selecting and assembling sheet material inthe manner described, material which is normally, as a single ply, weak from a load-bearing point of view is so assembled into a structure in which it receives the thrust of the load edge-wise and mutual cooperation of the contiguous sheets in stacked relationship resists buckling so that the composite structure has considerable compression strength. The strength is further enhanced by the facing pieces to cover the exposed edges of the sheet material and the adhesive securing the sheets. Where corrugated material is used the structure is cellular so the strength-weight factor is improved.
:
:
: . : -110(~803 example, corrugated material, around the packed structure to provide the facing strips and securing the free end of the flexible material to the structure. The wrapped around sheet may, if desired, be adhesively secured to the surfaces all around the packed structure. The corrugated material may be made from paperboard or other material from which corrugated is usually made.
In the use of the support, a container having a designated wall to be spaced and a support are also selected.
The removable sheet is removed from the support to uncover the adhesive face. The adhesive surface of the support is then pressed against the designated wall of the container to which it will immediately adhere by the action of the adhesive. One or several supports may be applied to one or more walls of the container in various arrangements depending on the spacing or supporting function desired.
According to a broad aspect, the present invention provides a method of making an elongated load bearing support of rectangular cross-section to be attached by pressure sen-sitive adhesive to a shipping container having a bottom walland a pair of spaced apart side walls to space said bottom wall from a support surface and strengthen said bottom wall, com-prising the steps of: selecting a plurality of elongated rec-tangular strips of corrugated sheet material having elongated spaced apart edges and in which the corrugations are perpen-dicular to said spaced apart edges, stacking said plurality of elongated rectangular strips side-by-side in adjacent con-tiguous relationship to form an elongated packed body of con-tiguous layers with said spaced apart edges of said strips exposed so as to present generally flat opposed elongated parallel surfaces, adhesively securing together said contiguous layers to prevent displacement of said layers relative to each ~ _ 3 _ E
110~81Q3 other, providing a first facing piece and a second rigid facing piece, adhesively securing said first facing piece to one of said flat opposed surfaces and adhesively securing said second rigid facing piece to the other of said flat opposed surfaces to strengthen and rigidify said elongated packed body and protect said edges of said strips, conforming the length of said elongated support substantially to the dimension bet-ween one pair of said spaced apart side walls and applying a coating of pressure sensitive adhesive and a removable protec-tive sheet for said pressure sensitive adhesive to the outersurface of at least one of said first and second facing piece.
The invention has been generally described and it will now be referred to in more detail by reference to the accompanying drawings, which illustrate preferred showings of supports made by the method of the invention and containers to which such supports have been applied. Referring more particularly to the d~awings:
Figure 1 is an isometric view from the top of a container having supports secured to it according to the invention Figure 2 is an isometric view of the bottom wall of the container shown in Figure 1:
Figure 3 is an enlarged end view of a support shown in Figures 1 and 2 Figure 4 is an isometric view of a support shown in Figures 1, 2 and 3 - 3a -g~
Figure 5 is an isometric view of another form of support;
Figure 6 is an isometric view of a cylindrical support;
Figure 7 is a bottom plan view of the support shown in Figure 6, Figure 8 is an isometric view of the bottom of a container employing cylindrical supports applied in accordance with one aspect of the invention, Figure 9 is a view similar to Figure 8 but showing supports applied in accordance with another aspect, and Figure 10 is an isometric view showing two containers disposed in side-by-side relationship with supports applied in accordance with the invention used for palletizing and to per-form a spacing function therebetween.
Referring to Figures 1 and 2, the numeral 10 desig-nates a conventional shipping container as used in industry topackage and transport various products, component parts or other contents and with which the present invention is advantageously employed to space the container from a surface. Figure 1 shows the container 10 resting on one side to provide a view of its underwall. The container 10, for example, may take the form of a box formed of corrugated material or cardboard which is supplied to the user in the form of a flat knocked-down blank to be assembled when needed. The container 10 comprises a top wall comprising two inwardly foldable flaps 12 and 14, a bottom wall also comprising two inwardly folded flaps 16 and 18 best seen in Figure 2, a front wall 20, a rear wall 22, a front wall 24 and a rear wall 26. The mating edges of the top flaps 12 and , llU~)8~3 14 are sealable by a strip of adhesive paper or tape 30, as shown in Figure 2. The mating edges of the bottom flaps 16 and 18 are also sealed by a strip of adhesive paper or tape 32, as shown in Figures 1 and 2.
To facilitate the handling and stacking of container 10 by means, for example of a fork-lift truck or similar appara-tus, or merely to space the container from the surface on w~ich it rests supports made according to the invention in the form of elongated legs or runners 34 and 36 are secured to the bottom side of the container by means of a quick-drying adhesive, such as a pressure sensitive adhesive.
As Figure 2 best shows, the supports 34 and 36 are elongated and of rectangular cross-section, and in this example are arranged in spaced apart relationship on the bottom wall of a container 10 so that their longitudinal axes extend trans-versely to the mating edges of the flaps 16 and 18 on the bottom wall of the container. When the elongated supports 34 and 36 are arranged in this manner they serve to strengthen the under-side of the container 10 as well as to provide means for spacing it from the surface on which it rests thereby providing a palletized container easily liftable by a fork-lift truck.
Since the supports 34 and 36 are made identically, only the manufacture of the support 36 will be described in detail. A plurality of long narrow corrugated sheet material strips are selected, with the long sides having parallel edges and corrugations perpendicular thereto. The material may be of corrugated paperboard of the type readily available in the container industry. These strips are arranged alongside one another and secured against displacement, in a stack, by fold-ing an outer sheath 42 around the stack and securing it togetheras by applying glue at 44 or several staples 46. In assembling the structure, glue may also be applied to adhesively secure the 8~)3 adjacent strips 40 together, prior to wrapping with the sheath 42. Glue may also be applied to the inner sides of the sheath 42 as at 50. As Figure 3 shows, each strip has been preferably arranged in a plane transverse (i.e. at right angles) to the bottom surface of the container 10, thus enabling a support 36 to support a greater compressive load.
A coating or layer 52 of quick drying or instant bond-ing adhesive, preferably pressure sensitive adhesive, is applied to the upper side 51 of the support 36 during manufacture. A
removable sheet or layer 54 of paper or film, treated to prevent it from adhering permanently is applied to the layer 52 for eventual peeling away.
After the container 10 has been assembled and at least the bottom side has its flaps 16 and 18 folded inwardly and - -suitably secured in place, as by the tape 32 to form a wall, the supports 34 and 36 are suitably arranged and attached to the bottom wall. In attaching a support 34 or 36, the protective sheet 54 is stripped away and the adhesive coated surface 50 -pressed against the wall of the container 10. The quick drying or instant bonding adhesive takes hold immediately to secure the support 34 or 36 to the container wall. Figures 1 and 2 show two elongated supports 34 and 36. Additional supports, arranged in a desired manner and with desired spacing may be applied to the wall of the container.
Figure 5 is a perspective view of another type of elongated support 60 made similarly to support 36. A plurality of strips 62 of corrugated material or cardboard are secured together as at 64 by adhesive. Unlike support 36, a folded outer sheet is not wrapped around the outside. Rather a facing piece 63 formed of corrugated material is glued by a suitable adhesive to the face presented by the edges of the strips 62.
The strips 63 and 65 are applied to strengthen and rigidify the )3 entire support 60 and protect the edges of the strips 62 forming the surface of the stack. Applying the top strip 63 provides a flat uninterrupted surface for the layer 68 of instant bonding adhesive. The bottom strip 65 is of hardboard, selected to be rugged and strong and capable of withstanding scuffing and scraping. As with the support 36, a layer 68 of quick drying or instant bonding adhesive protected by a removable sheet 70 is applied to the upper surface 66 of the top strip 63. The support 60 is applied by the same method and for the same purpose as the support 36, as described earlier.
Figures 6 and 7 show still another type of support 72, manufactured in accordance with the invention. Figures 8 and 9 show pluralities of supports 72 which have been affixed to the underside of containers 74 and 76, respectively. The containers 74 and 76 are similar to the container 10. In this case, each support 72 is made by winding or rolling a long narrow strip 80 of corrugated material or cardboard of uniform width into a generally cylindrical body. Glued as at 82 or a staple 84 is applied to the free end of the strip 80, to secure it in place and prevent the strip 80 from unravelling. A coat-ing or layer 88 of quick drying adhesive is applied to one flat end of the cylindrical body 72 serving as the upper side of the support. A removable sheet or layer 90 of paper or film is applied over the glue to protect it until ready for use.
The supports 72 may be usefully applied to the bottom of a container in various arrangements. Figure 8 shows supports 72 arranged symmetrically, one near each box corner. Figure 9 shows nine supports 72 arranged in symmetrical rows of three each. It is preferable to place the supports as shown in Figure 9 rather than as in Figure 8 if the containers 75 have to carry a substantially heavier load.
Figure 10 shows two containers lOa and lOb arranged .
)3 in side-by-side relationship. Two spaced apart supports 36 have been applied to the bottom wall of each container to space it from its supporting surface. In addition, a support 34a has been applied to a side or end wall 20 to serve as a buffer or spacer against the adjoining container lOb.
As an example of dimensions, making one embodiment of support 60 of the type shown in Figure 5, the components were selected so that the support was about 27-1/2 inches long, 4 inches wide and 3 inches high. About twenty strips 62 of corrugated material, each of the order of 3-3/16th of an inch thick were selected, assembled, and each joined to its adjacent strip by conventional air drying adhesive. For the bottom strip 65, hardboard of the order of 1/8th of an inch thick was selec-ted, and for the top strip 63, there was selected corrugated material of the order of l/8th of an inch to 3/16th of an inch thick.
It is evident that the invention provides a convenient way of spacing a shipping carton from a surface and a new way of making supports for this purpose economically from readily avail-able material. By selecting and assembling sheet material inthe manner described, material which is normally, as a single ply, weak from a load-bearing point of view is so assembled into a structure in which it receives the thrust of the load edge-wise and mutual cooperation of the contiguous sheets in stacked relationship resists buckling so that the composite structure has considerable compression strength. The strength is further enhanced by the facing pieces to cover the exposed edges of the sheet material and the adhesive securing the sheets. Where corrugated material is used the structure is cellular so the strength-weight factor is improved.
:
Claims (4)
1. A method of making an elongated load bearing support of rectangular cross-section to be attached by pressure sensi-tive adhesive to a shipping container having a bottom wall and a pair of spaced apart side walls to space said bottom wall from a support surface and strengthen said bottom wall, com-prising the steps of:
selecting a plurality of elongated rectangular strips of corrugated sheet material having elongated spaced apart edges and in which the corrugations are perpendicular to said spaced apart edges, stacking said plurality of elongated rectangular strips side-by-side in adjacent contiguous relationship to form an elongated packed body of contiguous layers with said spaced apart edges of said strips exposed so as to present generally flat opposed elongated parallel surfaces, adhesively securing together said contiguous layers to prevent displacement of said layers relative to each other, providing a first facing piece and a second rigid facing piece, adhesively securing said first facing piece to one of said flat opposed surfaces and adhesively securing said second rigid facing piece to the other of said flat opposed surfaces to strengthen and rigidify said elongated packed body and protect said edges of said strips;
conforming the length of said elongated support substantially to the dimension between one pair of said spaced apart side walls, and applying a coating of pressure sensitive adhesive and a removable protective sheet for said pressure sensitive adhesive to the outer surface of at least one of said first and second facing piece.
selecting a plurality of elongated rectangular strips of corrugated sheet material having elongated spaced apart edges and in which the corrugations are perpendicular to said spaced apart edges, stacking said plurality of elongated rectangular strips side-by-side in adjacent contiguous relationship to form an elongated packed body of contiguous layers with said spaced apart edges of said strips exposed so as to present generally flat opposed elongated parallel surfaces, adhesively securing together said contiguous layers to prevent displacement of said layers relative to each other, providing a first facing piece and a second rigid facing piece, adhesively securing said first facing piece to one of said flat opposed surfaces and adhesively securing said second rigid facing piece to the other of said flat opposed surfaces to strengthen and rigidify said elongated packed body and protect said edges of said strips;
conforming the length of said elongated support substantially to the dimension between one pair of said spaced apart side walls, and applying a coating of pressure sensitive adhesive and a removable protective sheet for said pressure sensitive adhesive to the outer surface of at least one of said first and second facing piece.
2. A method as defined in claim 1 and, wrapping said packed body with a sheet of flexible material and securing the free end of said sheet to said packed body to provide a sheath embodying said facing pieces.
3. A method, as defined in claim 1, in which said bot-tom wall comprises a pair of flaps having mating edges, orienting at least two of said supports such that they are disposed transversely of the mating edges of said flaps, taking off said removable sheet and applying the adhesively coated face to the bottom wall of the container.
4. A method, as defined in claim 3, wherein said sup-ports extend on said bottom wall in parallel spaced apart relation to one another.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA246,432A CA1100803A (en) | 1976-02-24 | 1976-02-24 | Method of making and applying supports for containers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA246,432A CA1100803A (en) | 1976-02-24 | 1976-02-24 | Method of making and applying supports for containers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1100803A true CA1100803A (en) | 1981-05-12 |
Family
ID=4105309
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA246,432A Expired CA1100803A (en) | 1976-02-24 | 1976-02-24 | Method of making and applying supports for containers |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1100803A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109160064A (en) * | 2018-07-25 | 2019-01-08 | 佛山市天谱安建材科技有限公司 | A kind of hydraulic automatic extension box |
-
1976
- 1976-02-24 CA CA246,432A patent/CA1100803A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109160064A (en) * | 2018-07-25 | 2019-01-08 | 佛山市天谱安建材科技有限公司 | A kind of hydraulic automatic extension box |
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